CN108240884A - The pressure drop monitoring system and monitoring method of the feed distributor of fluidized-bed reactor - Google Patents
The pressure drop monitoring system and monitoring method of the feed distributor of fluidized-bed reactor Download PDFInfo
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- CN108240884A CN108240884A CN201611207919.3A CN201611207919A CN108240884A CN 108240884 A CN108240884 A CN 108240884A CN 201611207919 A CN201611207919 A CN 201611207919A CN 108240884 A CN108240884 A CN 108240884A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/004—Sparger-type elements
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/24—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons
- C07C253/26—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00026—Controlling or regulating the heat exchange system
- B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
- B01J2208/0007—Pressure measurement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00539—Pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00054—Controlling or regulating the heat exchange system
- B01J2219/00056—Controlling or regulating the heat exchange system involving measured parameters
- B01J2219/00065—Pressure measurement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00162—Controlling or regulating processes controlling the pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Incineration Of Waste (AREA)
Abstract
The present invention relates to a kind of feed distributor pressure drops to monitor system.A kind of feed distributor pressure drop monitoring system of fluidized-bed reactor, including：First pressure measures mouth, is located on the feed distributor suction line of proximal response wall；Second pressure measures mouth, on the reactor wall between dispersion plate and the nozzle end of feed distributor；Measuring unit is used to measure the pressure data between the first pressure measurement mouth and second pressure measurement mouth；And controller, measuring device are connected to the controller, and measured pressure data is transmitted to the controller via signal wire；Wherein, controller calculates the pressure drop of feed distributor according to the pressure data transmitted by measuring unit, so as to judge whether the working condition of the feed distributor is normal.By the monitoring system and monitoring method that measure feed distributor pressure drop Δ Pd of the present invention, monitoring feed distributor working condition, and anticipation and processing are made in advance to it in real time can be realized.
Description
Technical field
The present invention relates to a kind of pressure drops for fluidized-bed reactor to monitor system and monitoring method.In particular to
For the pressure drop monitoring system and monitoring method of the feed distributor of ammonia oxidation reactor.
Background technology
Acrylonitrile is the important industrial chemicals of petrochemical industry.Countries in the world generally use ammoxidation One-step production propylene
Nitrile, i.e. unstripped gas air, propylene, ammonia under the effect of the catalyst, under certain reaction condition, are occurred by certain proportioning
Propylene ammonia Selective Oxidation, generation acrylonitrile and by-product acetonitrile and hydrogen cyanide etc., while release a large amount of reaction heat.Fig. 1 institutes
Show be business acrylonitrile fluid bed reactor 1, including：Reactor wall 4, air feed mouth 8, dispersion plate 6, third
Alkene ammonia feed distributor 10, cooling coil 7 and cyclone separator (not shown).
Typical acrylonitrile fluid bed propylene ammonia feed distributor is multitube distributor, and multitube distributor includes distribution
Device entrance；Feed distributor is responsible for；Feed distributor branch pipe；And feed distributor nozzle, fluid is connected in pipeline.Unstripped gas from
Distributor inlet enters, and is passed to along supervisor with being responsible on each branch pipe being connected, then as shown in Fig. 2, by branch pipe 12
Each orifice 13 of distribution is passed to nozzle 15, is finally passed in bed.In this way, unstripped gas is oriented to along feed distributor pipeline
It is dispersed in bed.
When carrying out the oxidation reaction of propylene ammonia using acrylonitrile fluid bed reactor, the propylene ammonia feed distributor of fluid bed
Pressure drop Δ PdIt is an important parameter.The design of good propylene ammonia feed distributor pressure drop can make reactor unit horizontal
Propylene ammonia unstripped gas containing equivalent on section, this requires the gas flow of each feed distributor nozzle outflow is equivalent
's.Unstripped gas is during across orifice, the local crushing of generation, i.e. in Fig. 2 at branch pipe 12 between 15 end of nozzle
Pressure difference, the pressure difference are propylene ammonia feed distributor pressure drop Δ Pd。
Propylene ammonia feed distributor gas distribution performance directly influences the reaction result of propylene ammonia selective oxidation, to ensure air-flow
Be uniformly distributed, and the not serious non-uniform consequence caused by certain fluctuation or the reduction of load, need to generally there is distributor
Enough pressure drops, scholars are accustomed to distributor pressure drop Δ PdWith bed pressure drop Δ PbThe ratio between be used as research object.ΔPd/ΔPb
Ratio is bigger, then the more uniform but excessive pressure drop of gas distribution causes excessive energy consumption.
Non-patent literature《Capacity-Expansion Revamping of Acrylonitrile Units is studied》(in fly etc.,《Contemporary chemical industry》2005, volume 34, the 5th
Phase, page 345~353) it discloses after acrylonitrile installation expands energy, since gas orifice speed increases, the abrasion of accelerator activator particle,
Destroy whole fluidized state.But in document, i.e., without the open method for measuring perforation Kong Su, also not publicly measure distributor pressure
The method of drop, and its announced about perforation hole speed and distributor pressure drop be the simulation of perfect condition as a result, rather than
True measurement result.
On the other hand, continuously improving with acrylonitrile technology, (propylene is transformed into target product to the activity index of catalyst
Yield), particle wearability, the separative efficiency of cyclone separator etc. all increase, meanwhile, reactor is also required to have higher
Operation lines speed is to improve the production capacity of acrylonitrile installation.Feed distributor pressure drop is relatively low to be easy to cause unstripped gas distribution not
, also it is more than easily since perforation hole speed is relatively low, the aperture possibility bigger than normal that catalyst is caused to alter especially for diameter
8.5 meters of the acrylonitrile fluid bed reactor of large size.Reaction result is directly influenced since feed distributor pressure drop is relatively low, while
It is unfavorable for the production steady in a long-term of device.
Invention content
In order to overcome above-mentioned technical problem, the present invention provides a kind of feed distributor pressure drop Δ P of fluidized-bed reactord's
The feed distributor pressure drop Δ P of monitoring system and monitoring ammonia oxidation reactordMethod.Distribution is fed by the measurement of the present invention
Device pressure drop Δ PdMonitoring system and monitoring method, can realize monitoring feed distributor working condition in real time, and it be shifted to an earlier date
Make anticipation and processing.
The present invention provides a kind of feed distributor pressure drop monitoring system of fluidized-bed reactor, including：First pressure measures
Mouthful, which measures mouth and is located on the feed distributor suction line of proximal response wall；Second pressure measures mouth, this second
Pressure measurement mouth is on the reactor wall between dispersion plate and the nozzle end of feed distributor；Measuring unit, the survey
Amount unit is used to measure the pressure data between first pressure measurement mouth and second pressure measurement mouth；And controller, measure dress
Put and be connected to the controller, and measured pressure data is transmitted to the controller via signal wire, wherein, controller according to
The pressure data transmitted by measuring unit calculates the pressure drop of feed distributor, so as to judging the working condition of feed distributor
It is whether normal.
Feed distributor pressure drop according to the present invention monitors system, wherein, measuring unit includes：First pressure measures dress
It puts, which is used to measure the pressure that first pressure measures propylene ammonia gaseous mixture at mouth；It is surveyed with second pressure
Measure device, which is used to measuring second pressure and measures pressure at mouth, also, wherein, controller according to
The pressure data transmitted by first pressure measuring device and Second device for pressure measurement calculates the pressure drop of feed distributor, from
And judge whether the working condition of feed distributor is normal.
Feed distributor pressure drop according to the present invention monitors system, wherein, measuring unit includes differential pressure measurement device, the pressure
Difference measuring device is used to measure the pressure differential between first pressure measurement mouth and second pressure measurement mouth, also, wherein, controller
The pressure drop of feed distributor is calculated according to the pressure data transmitted by differential pressure measurement device, so as to judge feed distributor
Whether working condition is normal.
Feed distributor pressure drop according to the present invention monitors system, further includes and is arranged on first pressure measurement mouth and the second pressure
Power measures the blow device at mouth, the blow device first pressure measure mouth and second pressure measure provide 0 at mouth~
10Nm3The purging wind of/h.
Feed distributor pressure drop according to the present invention monitors system, wherein, blow device measures mouth and the in first pressure
1~10Nm is provided at two pressure measurement mouths3The purging wind of/h.
Feed distributor pressure drop according to the present invention monitors system, wherein, when the pressure drop of feed distributor is bed pressure drop
25%~160% when, controller judgement feed distributor working condition be normal.
Feed distributor pressure drop according to the present invention monitors system, wherein, when the pressure drop of feed distributor is bed pressure drop
35%~140% when, controller judgement feed distributor working condition be normal.
Feed distributor pressure drop according to the present invention monitors system, further includes：High pressure nitrogen blow device, wherein, work as control
When the pressure drop of device judgement feed distributor processed is higher than the upper limit value of preset range, then start high pressure nitrogen blow device automatically, with
Feed distributor is purged.
Feed distributor pressure drop according to the present invention monitors system, further includes：High pressure nitrogen blow device, wherein, work as control
It is automatic to start high pressure nitrogen blow device when the pressure drop of device judgement feed distributor processed is less than the lower limiting value of preset range, and will
Nitrogen is continuously stably supplied in feed distributor so that the pressure drop of feed distributor reaches normal working condition.
The present invention provides a kind of method for the feed distributor pressure drop for being used to monitor fluidized-bed reactor, including：Setting the
One pressure measurement mouth, the first pressure measure mouth and are located on the feed distributor suction line of proximal response wall；The second pressure of setting
Power measures mouth, which measures reactor wall of the mouth between dispersion plate and the nozzle end of feed distributor
On；The pressure data between first pressure measurement mouth and second pressure measurement mouth is measured, and the pressure data is sent to control
Device；And feed distributor pressure drop is calculated according to pressure data by controller, and judge to feed branch device working condition whether
Normally.
Feed distributor pressure drop monitoring method according to the present invention, wherein, pressure data measures mouth and for first pressure
Pressure at two pressure measurement mouths.
Feed distributor pressure drop monitoring method according to the present invention, wherein, pressure data measures mouth and for first pressure
Pressure difference between two pressure measurement mouths.
Feed distributor pressure drop monitoring method according to the present invention is additionally included in first pressure and measures mouth and second pressure survey
It measures and 0~10Nm is provided at mouth3The purging wind of/h.
Feed distributor pressure drop monitoring method according to the present invention, wherein, it measures mouth in first pressure and second pressure is surveyed
It measures and 1~10Nm is provided at mouth3The purging wind of/h.
Feed distributor pressure drop monitoring method according to the present invention, wherein, when the pressure drop of feed distributor is bed pressure drop
25%~160% when, then the working condition for judging feed distributor is normal.
Feed distributor pressure drop monitoring method according to the present invention, wherein, when the pressure drop of feed distributor is bed pressure drop
35%~140% when, then the working condition for judging feed distributor is normal.
Feed distributor pressure drop monitoring method according to the present invention, wherein, when the pressure drop of judgement feed distributor is higher than pre-
When determining the upper limit value of range, then start high pressure nitrogen blow device automatically, feed distributor is purged.
Feed distributor pressure drop monitoring method according to the present invention, wherein, when the pressure drop of judgement feed distributor is less than pre-
It is automatic to start high pressure nitrogen blow device when determining the lower limiting value of range, and nitrogen is continuously stably supplied to charging distribution
In device so that the pressure drop of feed distributor reaches normal working condition.
Pass through the measurement feed distributor pressure drop Δ P of the present inventiondMonitoring system and monitoring method, can realize real-time prison
Feed distributor working condition is surveyed, and anticipation and processing are made in advance to it.
Description of the drawings
Fig. 1 is the schematic diagram of the propylene ammonia fluidized-bed reactor of the prior art.
Fig. 2 is the nozzle schematic diagram of the propylene ammonia feed distributor of the prior art.
Fig. 3 is the schematic diagram of the feed distributor pressure drop monitoring system of the present invention.
Fig. 4 is the schematic diagram of the feed distributor pressure drop monitoring system of the present invention.
Reference sign
1 propylene ammonoxidizing fluid bed reactor
2 propylene ammonia feed distributor entrances
3 pressure measurement mouths
4 wall of reactor
5 measuring units
6 dispersion plates
7 cooling coils
8 air feed mouths
9 nitrogen purging devices
10 feed distributors
12 branch pipes
13 orifices
14 nozzles
Specific embodiment
The feed distributor of the present invention by taking propylene ammonoxidizing fluid bed reactor as an example, will be described in detail with reference to the attached drawings below
Pressure drop Δ PdMonitoring system and monitoring method, but the present invention is not limited to the feed distributors of ammonia oxidation reactor.
Normal conditions, it is desirable that there is identical gas flow, i.e. requirement charging point on fluidized-bed reactor unit cross-sectional area
The amount of unstripped gas that each nozzle of cloth device is flowed out is consistent, i.e., propylene ammonia gaseous mixture is by the punching rate of each orifice
Identical.However, perforation Kong Su is to be very difficult to measurement and monitoring, therefore, it is desirable to directly be reacted by punching rate anti-
The working condition for answering device is extremely difficult.
The present inventor is by the discovery that studies for a long period of time, feed distributor pressure drop Δ PdSpeed during orifice is passed through to have with gaseous mixture
It closes.Device is in normal course of operation, when generation feed distributor part, orifice has stopping state generation, due to other orifices
The tolerance increase flowed through leads to the increase of average bore hole speed, this result shows feed distributing plate pressure differential deltap PdIncrease；
And when there is nitridation embrittlement to occur on feed distributor pipe fitting, there are more unstripped gas to enter bed by crack, lead to orifice
The tolerance flowed through is reduced, and the result of the reduction of average bore hole speed shows feed distributing plate pressure differential deltap PdReduction.
As described above, pressure difference, the pressure difference are the charging point of propylene ammonia between 15 end of nozzle at branch pipe 12 in Fig. 2
Cloth device pressure drop Δ Pd.But in the actual production process, due to the fact that causing to be difficult to practical measurement portion shown in Fig. 2
The pressure difference of position.Firstly, since the reaction temperature of reactor is very high, generally at 400 DEG C or more, sensor can be damaged.Separately
On the one hand, it sets sensor that can also influence the charging effect of feed distributor in feed distributor, it is uneven to be easy to cause charging
It is even.
The present inventor is through studying and testing discovery, in propylene ammonia gaseous mixture in 10 inlet of feed distributor to branch pipe 12
The crushing that crushing and propylene ammonia gaseous mixture at (specific location shown in Fig. 2) enter through nozzle 15 at catalyst bed is equal
It is very small, relative to feed distributor pressure drop Δ P defined abovedIt can be ignored.Based on this discovery, this hair is realized
Bright feed distributor pressure drop Δ PdMonitoring device and monitoring method.
Specifically, the as shown in figure 3, feed distributor pressure drop Δ P of the present inventiondMeasuring device includes：First pressure is surveyed
Measure mouth 2, second pressure measures mouth 3, measuring unit 5 and controller (not shown).
The position for measuring first pressure mouth 2 is not specifically limited, but for purpose easy to operate, preferably by it
It is set on the suction line of feed distributor 10 of proximal response wall 4, to measure the propylene ammonia of 10 inlet of feed distributor
Mixture pressure.Second pressure measure mouth 3 be preferably located in dispersion plate 6 and feed distributor 10 nozzle 15 end it
Between reactor wall 4 on, to measure the pressure of the propylene ammonia gaseous mixture in the exit of the nozzle 15 of feed distributor 10.For surveying
The type of amount unit 5 is not specifically limited, and individual pressure gauge may be used and measure the first pressure measurement pressure of mouth 2 and second respectively
Power measures the pressure of propylene ammonia gaseous mixture that mouth 3 is respectively located, and respective pressure data then is transmitted to controller, then by controlling
Device processed is come the difference that both calculates, so as to obtain the pressure drop Δ P of feed distributord.Alternatively, it can also directly be surveyed using differential pressure indicator
One pressure measurement mouth of flow control and second pressure measure the pressure difference between mouth, and by the data transmission to controller.
The type of controller is not specifically limited, but preferably DCS control systems, can intuitively show that pressure difference becomes
Change situation, i.e. feed distributor pressure drop Δ PdSituation of change.
Preferably, it to prevent catalyst blockage pressure from measuring mouth, measures mouth in first pressure and second pressure is measured at mouth
The purging wind (not shown) of identical working condition is given respectively.Purging wind is 0~10Nm3/ h, preferably 1~10Nm3/h。
In the case where the distinguished and admirable speed of purging is excessive, catalyst bed may be had an impact.
As shown in figure 4, the feed distributor pressure drop Δ P of the present inventiondMeasuring device further includes high pressure nitrogen blow device 9.
Nitrogen purging device 9 is connected to feed distributor 10, as DCS control systems judgement feed distributor pressure drop Δ PdMeasured value does not exist
During preset range, the high pressure nitrogen blow device can be started automatically, and high pressure nitrogen is introduced to feed distributor 10.
Feed distributor pressure drop Δ P according to the present inventiondMeasuring device, can be to feed distributor pressure drop Δ PdIt is surveyed
It measures and judges whether the working condition of feed distributor is normal.
In Acrylonitrile Production, the variation in feed distributor orifice aperture influences the change of unstripped gas perforation Kong Su
Change, directly show feed distributing plate pressure drop Δ PdVariation.Pass through feed distributing plate pressure drop Δ P as a result,dChange be turned to sentence
It is feasible that whether disconnected feed distributor, which is in normal operating conditions,.
Device is in normal course of operation, when generation feed distributor part, orifice has stopping state generation, due to it
The tolerance increase that his orifice flows through leads to the increase of average bore hole speed, this result shows feed distributing plate pressure differential deltap Pd's
Increase；And when there is nitridation embrittlement to occur on feed distributor pipe fitting, there are more unstripped gas to enter bed by crack, cause
The tolerance that orifice flows through is reduced, and the result of the reduction of average bore hole speed shows feed distributing plate pressure differential deltap PdReduction.Into
Increasing or reducing for material distribution grid pressure difference reflects that feed distributor is in improper working condition.
Specifically, in the feed distributor pressure drop Δ P of the present inventiondIn measuring device, by the pressure measured by measuring unit
Force data feeds back (transmission) to DSC control systems.As feed distributor pressure drop Δ PdMeasured value is bed pressure drop Δ Pb25%~
When 160%, then the working condition for judging feed distributor is normal.Feed distributor pressure drop Δ PdMeasured value is preferably bed
Pressure drop Δ Pb30%~150%, more preferably bed pressure drop Δ Pb35%~140%.
On the contrary, as feed distributor pressure drop Δ PdWhen measured value is not within above range, then feed distributor 10 is judged
Working state abnormal.
Specifically, device is in normal course of operation, as feed distributor pressure drop Δ PdMeasured value is higher than above range
Upper limit value when, DCS control systems give high limit prompting, remind feed distributor 10 there may be part orifice stopping state simultaneously
The automatic high pressure nitrogen blow device 9 that starts purges feed distributor, and high pressure nitrogen is introduced to the pipe of feed distributor 10
Lu Zhong blocks so as to eliminate.And as feed distributor pressure drop Δ PdWhen measured value is less than the setting lower limit of above range, DCS controls
System processed gives lower bound prompting, and propylene ammonia feed distributor is reminded to there is a possibility that nitrogenize embrittlement.
Device is during overload operation, and the unstripped gas scale of construction of each orifice outflow of feed distributor is compared with device at full capacity
During operation synchronize increase, for same device, the perforation Kong Su that gas flows through orifice also increased, can equally show into
Expect distributor pressure drop Δ PdIncrease, the present invention feed distributor pressure drop Δ PdIt, will be measured by measuring unit in measuring device
Pressure data feedback (transmission) to DSC control systems.DCS control systems give high limit prompting, feed distributor Δ PdWith not
It is advisable higher than set upper limit value, for example, the upper limit value can be set as to device bed pressure drop Δ Pb160%.
Device is during underrun, and the unstripped gas scale of construction of each orifice outflow of feed distributor is compared with device at full capacity
It synchronizes and reduces during operation, for same device, the perforation Kong Su that gas flows through orifice is also reduced, and shows charging distribution
Device pressure drop Δ PdReduction, under extreme case, influence feed distributor gas distribution effect, lead to feed uneven, reaction result
Deteriorate.In the feed distributor pressure drop Δ P of the present inventiondIn measuring device, the pressure data feedback measured by measuring unit (is passed
It is defeated) to DSC control systems.DCS control systems give lower bound prompting, for example, the lower limiting value can be set as to device bed pressure
Δ P dropsb20%.When device underrun, feed distributor measures pressure differential deltap PdIt is automatic to start height during less than lower limiting value
Press nitrogen purging device, and nitrogen flow can be adjusted so that nitrogen can steadily continuously with entering raw material gas pipeline, and
It is mixed with unstripped gas and is introduced to feed distributor, meet feed distributor pressure differential deltap PdReach what DCS control systems were given
Lower limit set value makes reactor maintain normal operation.
Embodiment
Carry out the feed distributor pressure drop Δ P to the present invention of the present invention below by way of specific embodimentdMonitoring device carries out
More detailed description.But the present invention is not limited to specific examples below.
Embodiment 1
Acrylonitrile fluid bed reactor diameter is 7 meters, and catalyst is rubbed using conventional commercial propylene nitrile catalyst, unstripped gas
You compare propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Device is lower at full capacity to be transported
Row, respectively on the suction line of the proximal response wall of feed distributor and the nozzle end of dispersion plate and feed distributor
Between reactor wall on set pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributordFor bed layer pressure Δ Pb's
41.6%.Reaction result is that AN yields are 80.2%, propylene conversion 98.0%.
Embodiment 2
With reacting working condition with embodiment 1, device is existed acrylonitrile fluid bed reactor respectively with being run under 80% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, the pressure drop Δ Pd of actually measured Acrylamide distributor is the 26.8% of bed layer pressure Δ Pb.
Reaction result is that AN yields are 79.7%, propylene conversion 97.5%.
Embodiment 3
With reacting working condition with embodiment 1, device is existed acrylonitrile fluid bed reactor respectively with being run under 70% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, starts high pressure nitrogen device, draws nitrogen and enter feed distributor, measure Acrylamide distributor
Pressure drop Δ Pd is the 41.4% of bed layer pressure Δ Pb.Reaction result is that AN yields are 80.0%, propylene conversion 98.6%.
Comparative example 1：
With reacting working condition with embodiment 1, device is lower at full capacity to be run acrylonitrile fluid bed reactor.It is feeding respectively
Reactor on the suction line of the proximal response wall of distributor between dispersion plate and the nozzle end of feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb21.8%.Reaction knot
Fruit is that AN yields are 79.4%, propylene conversion 97.1%.
Comparative example 2
With reacting working condition with embodiment 1, device is lower at full capacity to be run acrylonitrile fluid bed reactor.It is feeding respectively
Reactor on the suction line of the proximal response wall of distributor between dispersion plate and the nozzle end of feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb18.2%.Reaction knot
Fruit is that AN yields are 75.3%, propylene conversion 93.2%.Device parking maintenance finds that there are many places for feed distributor pipeline
Embrittlement leaks.
Embodiment 4
Acrylonitrile fluid bed reactor diameter is 12 meters, and catalyst uses acrylonitrile catalyst in the same manner as in Example 1,
Feed gas molar compares propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Device is expired
It is run under load, respectively on the suction line of the proximal response wall of feed distributor and dispersion plate and feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on the reactor wall between nozzle enddFor bed pressure
Power Δ Pb42.6%.Reaction result is that AN yields are 80.1%, propylene conversion 98.4%.
Embodiment 5
With reacting working condition with embodiment 4, device is existed acrylonitrile fluid bed reactor respectively with being run under 70% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
It answers and pressure monitoring mouth is set respectively on wall, the pressure drop Δ Pd of actually measured Acrylamide distributor is bed layer pressure Δ Pb's
25.8%.Reaction result is that AN yields are 79.3%, propylene conversion 96.5%.
Embodiment 6
With reacting working condition with embodiment 4, device is existed acrylonitrile fluid bed reactor respectively with being run under 70% load
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, starts high pressure nitrogen device, draws nitrogen and enter feed distributor, measure Acrylamide distributor
Pressure drop Δ Pd is the 38.8% of bed layer pressure Δ Pb.Reaction result is that AN yields are 79.8%, propylene conversion 98.2%.
Embodiment 7
Acrylonitrile fluid bed reactor diameter is 9.0 meters, and catalyst uses acrylonitrile catalyst identical in embodiment 1,
Feed gas molar compares propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Exist respectively
It is anti-between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of feed distributor
Setting pressure monitoring mouth on wall is answered, the pressure drop Δ Pd of actually measured Acrylamide distributor is the 90.9% of bed layer pressure Δ Pb.
Reaction result is that AN yields are 80.5%, propylene conversion 99.1%.
Embodiment 8
Acrylonitrile fluid bed reactor diameter is 12 meters, and catalyst uses acrylonitrile catalyst identical in embodiment 1, former
Expect gas molar ratio propylene:Ammonia:Air is 1:1.1:9.3, reaction temperature is 440 DEG C, reaction pressure 0.5kg/m3.Respectively into
Expect reacting between dispersion plate and the nozzle end of feed distributor on the suction line of the proximal response wall of distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb98.8%.Reaction
As a result be AN yields it is 80.3%, propylene conversion 98.7%.
Embodiment 9
With reacting working condition with embodiment 8, device is lower at full capacity to be run acrylonitrile fluid bed reactor.It is feeding respectively
Reactor on the suction line of the proximal response wall of distributor between dispersion plate and the nozzle end of feed distributor
Pressure monitoring mouth, the pressure drop Δ P of actually measured Acrylamide distributor are set on walldFor bed layer pressure Δ Pb172.4%.Reaction
As a result be AN yields it is 78.7%, propylene conversion 96.5%.DSC control systems start nitrogen purging device automatically, will be high
Pressure nitrogen introduces feed distributor and is purged.It closes nitrogen purging device and after stable reaction, measures Acrylamide distributor
Pressure drop Δ PdFor bed layer pressure Δ Pb103.1%.Reaction result is that AN yields are 80.4%, propylene conversion 98.7%.
Claims (18)
1. a kind of feed distributor pressure drop monitoring system of fluidized-bed reactor, including：
First pressure measures mouth, which measures mouth and be located on the feed distributor suction line of proximal response wall；
Second pressure measures mouth, the second pressure measure mouth be located at dispersion plate and the feed distributor nozzle end it
Between reactor wall on；
Measuring unit, the measuring unit are used to measure the pressure between the first pressure measurement mouth and second pressure measurement mouth
Force data；And
Controller, the measuring device are connected to the controller, and measured pressure data is transmitted to this via signal wire
Controller,
Wherein, the controller calculates the pressure of the feed distributor according to the pressure data transmitted by the measuring unit
Drop, so as to judge whether the working condition of the feed distributor is normal.
2. feed distributor pressure drop as described in claim 1 monitors system,
Wherein, the measuring unit includes：
First pressure measuring device, the first pressure measuring device measure propylene ammonia mixing at mouth for measuring the first pressure
The pressure of gas；With
Second device for pressure measurement, the Second device for pressure measurement are used to measure the pressure at the second pressure measurement mouth, and
And
Wherein, the controller is according to the pressure transmitted by the first pressure measuring device and the Second device for pressure measurement
Force data calculates the pressure drop of the feed distributor, so as to judging whether the working condition of the feed distributor is normal.
3. feed distributor pressure drop as described in claim 1 monitors system,
Wherein, the measuring unit includes differential pressure measurement device, which measures for measuring the first pressure
Mouth measures the pressure differential between mouth the second pressure, and
Wherein, the controller calculates the feed distributor according to the pressure data transmitted by the differential pressure measurement device
Pressure drop, so as to judge whether the working condition of the feed distributor normal.
4. feed distributor pressure drop as described in claim 1 monitors system, further include and be arranged on the first pressure measurement mouth
The blow device at mouth is measured with the second pressure, which measures mouth and the second pressure in the first pressure
It measures and 0~10Nm is provided at mouth3The purging wind of/h.
5. feed distributor pressure drop as claimed in claim 4 monitors system, wherein, the blow device is in the first pressure
It measures mouth and the second pressure measures and 1~10Nm is provided at mouth3The purging wind of/h.
6. the feed distributor pressure drop monitoring system as described in claim 1 to 5 any one, wherein, when the charging distribution
When the pressure drop of device is the 25%~160% of bed pressure drop, the controller judges that the working condition of the feed distributor is just
Normal.
7. feed distributor pressure drop as claimed in claim 6 monitors system, wherein, when the pressure drop of the feed distributor is institute
When stating the 35%~140% of bed pressure drop, the controller judges that the working condition of the feed distributor is normal.
8. feed distributor pressure drop monitoring system as claimed in claims 6 or 7, further includes：
High pressure nitrogen blow device, wherein,
When the controller judges that the pressure drop of the feed distributor is higher than the upper limit value of preset range, then described in automatic startup
High pressure nitrogen blow device, to be purged to the feed distributor.
9. feed distributor pressure drop monitoring system as claimed in claims 6 or 7, further includes：
High pressure nitrogen blow device, wherein,
When the controller judges that the pressure drop of the feed distributor is less than the lower limiting value of preset range, start the height automatically
Nitrogen purging device is pressed, and nitrogen is continuously stably supplied in the feed distributor so that the feed distributor
Pressure drop reach normal working condition.
10. it is a kind of for monitoring the method for the feed distributor pressure drop of fluidized-bed reactor, including：
First pressure is set to measure mouth, which measures mouth and be located on the feed distributor suction line of proximal response wall；
Second pressure is set to measure mouth, which measures the nozzle end that mouth is located at dispersion plate and the feed distributor
On reactor wall between end；
The pressure data between the first pressure measurement mouth and second pressure measurement mouth is measured, and the pressure data is passed
It send to controller；And
The feed distributor pressure drop is calculated according to the pressure data by the controller, and judges charging branch device
Whether working condition is normal.
11. feed distributor pressure drop monitoring method as claimed in claim 10, wherein,
The pressure data measures the pressure at mouth and second pressure measurement mouth for the first pressure.
12. feed distributor pressure drop monitoring method as claimed in claim 10, wherein,
The pressure data measures the pressure difference between mouth and second pressure measurement mouth for the first pressure.
13. feed distributor pressure drop monitoring method as claimed in claim 10, be additionally included in the first pressure measure mouth and
The second pressure, which measures, provides 0~10Nm at mouth3The purging wind of/h.
14. feed distributor pressure drop monitoring method as claimed in claim 13, wherein, measure mouth and institute in the first pressure
It states second pressure and 1~10Nm of offer at mouth is provided3The purging wind of/h.
15. the feed distributor pressure drop monitoring method as described in claim 10 to 14 any one, wherein, when the charging point
When the pressure drop of cloth device is the 25%~160% of bed pressure drop, then the working condition for judging the feed distributor is normal.
16. feed distributor pressure drop monitoring method as claimed in claim 15, wherein, when the pressure drop of the feed distributor is
The bed pressure drop 35%~140% when, then the working condition for judging the feed distributor is normal.
17. the feed distributor pressure drop monitoring method as described in claim 15 or 16, wherein, when the judgement feed distributor
Pressure drop be higher than preset range upper limit value when, then automatically start high pressure nitrogen blow device, to the feed distributor carry out
Purging.
18. the feed distributor pressure drop monitoring method as described in claim 15 or 16, wherein, when the judgement feed distributor
Pressure drop be less than preset range lower limiting value when, start the high pressure nitrogen blow device automatically, and nitrogen is continuously stablized
Ground is supplied in the feed distributor so that the pressure drop of the feed distributor reaches normal working condition.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207919.3A CN108240884B (en) | 2016-12-23 | 2016-12-23 | Pressure drop monitoring system and monitoring method for feeding distributor of fluidized bed reactor |
| EP17882485.0A EP3561471B1 (en) | 2016-12-23 | 2017-10-31 | Pressure drop control system and control method of feed distributor of a fluidized bed reactor |
| ES17882485T ES2905828T3 (en) | 2016-12-23 | 2017-10-31 | Pressure drop control system and feed distributor control procedure of a fluidized bed reactor |
| JP2019533350A JP7038716B2 (en) | 2016-12-23 | 2017-10-31 | Pressure drop control systems and methods for fluidized bed reactor feed distributors |
| EA201991539A EA037190B1 (en) | 2016-12-23 | 2017-10-31 | Pressure drop control system and method for feed distributor in fluidized bed reactor |
| KR1020197021046A KR102453080B1 (en) | 2016-12-23 | 2017-10-31 | Pressure drop control system and pressure drop control method for feed distributor of fluidized bed reactor |
| PCT/CN2017/108460 WO2018113417A1 (en) | 2016-12-23 | 2017-10-31 | Pressure drop control system and control method of feed distributor of a fluidized bed reactor |
| SA519402023A SA519402023B1 (en) | 2016-12-23 | 2019-06-20 | Pressure drop control system and control method of feed distributor of a fluidized bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611207919.3A CN108240884B (en) | 2016-12-23 | 2016-12-23 | Pressure drop monitoring system and monitoring method for feeding distributor of fluidized bed reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108240884A true CN108240884A (en) | 2018-07-03 |
| CN108240884B CN108240884B (en) | 2020-04-17 |
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ID=62624483
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611207919.3A Active CN108240884B (en) | 2016-12-23 | 2016-12-23 | Pressure drop monitoring system and monitoring method for feeding distributor of fluidized bed reactor |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP3561471B1 (en) |
| JP (1) | JP7038716B2 (en) |
| KR (1) | KR102453080B1 (en) |
| CN (1) | CN108240884B (en) |
| EA (1) | EA037190B1 (en) |
| ES (1) | ES2905828T3 (en) |
| SA (1) | SA519402023B1 (en) |
| WO (1) | WO2018113417A1 (en) |
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|---|---|---|---|---|
| US20230026757A1 (en) * | 2019-11-20 | 2023-01-26 | China Petroleum & Chemical Corporation | Gas Distribution Plate, Fluidizing Device and Reaction Method |
| JP7428592B2 (en) | 2020-05-28 | 2024-02-06 | 東邦チタニウム株式会社 | Titanium tetrachloride manufacturing method and chlorination furnace |
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| CN103908930A (en) * | 2014-03-31 | 2014-07-09 | 神华集团有限责任公司 | Method for cleaning distribution plate of fluidized bed reactor and control system of method |
| CN206648775U (en) * | 2016-12-23 | 2017-11-17 | 中国石油化工股份有限公司 | The pressure drop monitoring system of the feed distributor of fluidized-bed reactor |
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|---|---|---|---|---|
| JPH0415303Y2 (en) * | 1987-08-18 | 1992-04-07 | ||
| US5801265A (en) * | 1995-08-24 | 1998-09-01 | Praxair Technology, Inc. | Method and apparatus for direct oxygen injection with a reactant stream into a fluidized bed reactor |
| US6973375B2 (en) * | 2004-02-12 | 2005-12-06 | Mykrolis Corporation | System and method for flow monitoring and control |
| US20080193340A1 (en) * | 2007-02-09 | 2008-08-14 | Cocco Raymond A | Fluidized bed sparger |
| CN102753262B (en) * | 2010-01-25 | 2016-11-09 | 旭化成株式会社 | Gas phase reaction method |
| CN104941524B (en) * | 2014-03-31 | 2020-11-03 | 英尼奥斯欧洲股份公司 | Feed distributor design for ammoxidation reactor |
| CN104624401B (en) * | 2015-03-06 | 2019-01-15 | 英尼奥斯欧洲股份公司 | Improved cyclone design |
| CN204619935U (en) * | 2015-04-27 | 2015-09-09 | 中国石油天然气股份有限公司 | Gas-phase fluidized-bed reaction system and dry powder catalyst vibration charging system thereof |
| CN205797156U (en) * | 2016-01-08 | 2016-12-14 | 中国石油化工股份有限公司 | Feed distributor for the fluidized-bed reactor of ammoxidation reaction |
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2016
- 2016-12-23 CN CN201611207919.3A patent/CN108240884B/en active Active
-
2017
- 2017-10-31 EA EA201991539A patent/EA037190B1/en unknown
- 2017-10-31 KR KR1020197021046A patent/KR102453080B1/en active IP Right Grant
- 2017-10-31 WO PCT/CN2017/108460 patent/WO2018113417A1/en unknown
- 2017-10-31 EP EP17882485.0A patent/EP3561471B1/en active Active
- 2017-10-31 JP JP2019533350A patent/JP7038716B2/en active Active
- 2017-10-31 ES ES17882485T patent/ES2905828T3/en active Active
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2019
- 2019-06-20 SA SA519402023A patent/SA519402023B1/en unknown
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| US4865540A (en) * | 1989-02-01 | 1989-09-12 | Foster Wheeler Energy Corporation | Air flow measurement device for fluidized bed reactor |
| CN103908930A (en) * | 2014-03-31 | 2014-07-09 | 神华集团有限责任公司 | Method for cleaning distribution plate of fluidized bed reactor and control system of method |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2018113417A1 (en) | 2018-06-28 |
| ES2905828T3 (en) | 2022-04-12 |
| SA519402023B1 (en) | 2022-06-14 |
| JP7038716B2 (en) | 2022-03-18 |
| EA037190B1 (en) | 2021-02-17 |
| EA201991539A1 (en) | 2019-11-29 |
| EP3561471B1 (en) | 2021-12-01 |
| EP3561471A4 (en) | 2020-07-01 |
| KR20190100265A (en) | 2019-08-28 |
| JP2020501895A (en) | 2020-01-23 |
| EP3561471A1 (en) | 2019-10-30 |
| CN108240884B (en) | 2020-04-17 |
| KR102453080B1 (en) | 2022-10-07 |
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